Track-jack



i ,(No Model.)

' vJ. MGMURR'IN.

I vTRAQK JAGK.

110.549,933. f Patented/Nov. 1,9,i 1895.

im) S d UNITED STATES' JOSEPH MCMUREIN, OE sIIOsI-IONE, IDAHO. '31

" PATENT OFFICE.

TRAC K-JAC K.

SPECIFICATION forming part of Letters Patent No. 549,933, dated November 19, 1895.

Application filed Mlh 41 1895- Serial No. 540,448. (No model.)

To all whom it may concern:

Be it known that I, JOSEPH MOMUERIN, of Shoshone, in the county of Logan and State of Idaho, have invented a new and Improved Track-Jack, of which the following is a full, clear, and exact description.

The invention relates to trackjacks such as shown and described in the Letters Patent of the United States, No. 504,935, granted to me on September l2, 1893.

The object of the invention is to provide a newand improved track-jack which is comparatively simple and durable in construction, more especially designed for use on railroad-tracks to raise and lower rails, dac., and arranged to permit the operator to conveniently manipulate the jack with comparatively little exertion.

The invention consists in certain parts and details and combinations of the same, as will be hereinafter more fully described, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this speciiication, in which similar letters of reference indicate corresponding parts in all the views.

Figure l is asectional side elevation of the improvement. Fig. 2 is an end view of the same. Fig. 3 is a sectional plan vipw of the same on the line 3 3 of Fig. l. Fig. 4- is a rear elevation of the slide and standard. Fig. 5 is an enlarged sectional side elevation of the springs for operating the dogs. Fig. 6 is a rear view of the lever for operating the springs, and Fig. 7 is a transverse section of the same and adjacent parts.

The improved track-jack is provided with a base A, on which is fastened a standard B, provided with two legs B" and B2, placed a suitable distance apart to form the vertical slot B3, as plainly shown in the drawings. On the Outer faces of the legs B and B2 are arranged teeth B4 and B5, respectively, having an upward inclination, with the upper surfaces of the teeth iiat or straight. The top surfaces of the teeth on one leg of the standard are transversely Opposite about the center of the teeth on the opposite leg, so that the teeth on the two legs are alternate in location. Flanges B6 are arranged on the ends of the teeth B4 and B5 on both legs B and B2, as will be readily understood by reference to Fig. 3.

On the legs B' and B2 of the standard B is iitted to slide vertically a ratchet-slide c, provided at its ends with apertures C, adapted to be engaged by the pointed end of a tool to manipulate the slide,as hereinafter more fully described. In the ratchet-slide C are pivoted the dogs D andD, adapted to engage the teeth B4 and B5, respectively, the said dogs having their pivots D2 and D3 transversely in the slide C, with the rear ends connected with each other by a cross-bar D4.

In the middle of the cross-bar D4 is formed a triangular opening D5, engaged by a button E, extending into a vertically-disposed slotF, formed in a lever F, secured on the trunnion G', formed on the upper end of a lifting-bar G, fitted to slide with its shank G2 in the slot B3, the lower end of the shank carrying a foot G3 projecting to the front of the standard B to support a rail or other device. The shank G2 is preferably formed with the widened front portion G4, fitted into the correspondinglywidened front part of the slot B3, as will be readily understood by reference to Figs. l, 2, and 3. Apivot G5, formed on the shank G2 opposite the trunnion G, engages a bearing in the front face of the slide C, so that the latter is mounted to rock on the liftingbar G at G5 and G.

On the lower end of the lever F is secured a transversely-extending pin.F2, extending through a longitudinal slot into a tube H, pressed on at its outer ends by springs I and I', connected with flanges or lugs D6 and D7, respectively, projecting from the dogs D and D. Lighter coiled springs I2 and I3 are arranged within the springs I and I', and likewise rest with their Outer ends on the said lugs D6 and D7, and .their inner ends press on blocks H4 and H2, fitted loosely in the 'tube H on opposite sides of the pin F2. (See Fig. 5.)

Now, it will be seen that when the button E is in an uppermost position in the aperture D5, then it permits the lever F to hangk loose, so that no action is had on the springs I, I', I2, and I3 by the pin F2 operating on the blocks H and H2. When the button kE is in this position, the lifting-bar G is raised, as by manipulating the ratchet-slide C by canting it alternately sidewise. The dogs D and D', it will be understood, are through this manipulation of the slide C alternately engaged with IOO their corresponding teeth on opposite sides of the standard.

\Vhen it is desired to lower the lifting-bar G, then the operator presses the button E down in the aperture l)5 to the position shown *in Fig. Ll, whereby tilting or eanting of the ratchet-slide C causes the button to im part a swinging motion to the lever F, so that the pin F2 presses alternately on the inner ends of the blocks ll H2 to compress the correspend in g springs l2 l to throw the corresponding dog l) or D' out of engagement with its corresponding tooth.

rlhe button E is shifted in the slot F of the lever F, preferably, by hand.

The lever F is made of spring material and the slot F is connected with the aperture for the trunnion G'. 'lhe slot Fis contracted at a point near its top, as shown in Fig. G, so that when the button l1 is pushed up to the top of the slot the stem of the button is forced through this contracted portion and retained above it until the button E again moved by hand to its lower position lt is understood that the lever F causes the springs to push the upper dog, so that when the pressure on the hand-lever or other tool used on the ratchet-slide C is su iiicient to take the weight from the lifting-bar G, then the dog will jump back oli the ratchet-tooth in the standard l5. The alternating movement given to the ratchet-slide C releases the upper dog, and consequently the slide is lowered by the passing of the dog downward alternately from one tooth to another. Two springs l l'l and l' 13 are used, the springs I l' being pull.-sp1ings and the springs l2 lbeingpushsprings of sullieient tension to overcome the tension of the pull-springs, so that the inner coil has the power of extending the outer coil when the short lever F acts upon the corresponding block ll/ or Il.

lt is also understood that when the liftingbar G is lowered at the time the button E is in a lowermost position in the aperture D5, then the short lever F swings alternately with the motion of the slide C, and when the weight is released from the upper dog by pressure on the hand-lever manipulating the slide C, then the pressure on the small lever brings pressure onv the inner springs, so as to force that dog out of its tooth, whereby the lifting-bar is permitted to drop one tooth, thereby throwing the dog on the opposite side into an uppermost position and thereby canting the slide in the other direction. At the same time the short lever F n ow acts on the inside spring connected with the other and now upper dog, and the above-described operation is again repeated.

llavin g thus described my invention ,l claim as new and desire to secure by Letters latentl. A track jack, comprising a standard having legs spaced apart to form a vertical slot, the outer faces of the legs being provided with teeth pitched in one direction and alternately located, a ratchet slide on the said standard, spring pressed dogs pivoted on the said slide and held at the outer sides oit the said legs and a lifting bar iitted to slide in the said slot, the said ratchet slide being jonrnaled on the upper end of the said lifting bar, substantially as shown and described.

2. A track jack, comprising a standard provided on opposite sides with teeth pitched in one direction and alternately located, a ratchet slide on the said standard, springpressed dogs pivoted on the said slide, a lifting bar fitted to slide on the -said standard and. on. which the said ratchet slide is journaled, and a lever mounted to swing and adapted to he actuated by the canting of the said ratchet slide, the said lever serving to compress the springs i'or throwing the dogs out ot' their teeth when lowering the slide, substantially as shown and described.

A track jack provided with a standard formed on opposite sides with teeth pitched in one direction and alternately located, and .flanges arranged on the ends ol' the teeth to protect the latter and strengthen the standard, substantially as shown and described.

4. A track jack, comprising a tooth ed stan d,- ard, a ratchet slide litted to slide on. the said standard, a lifting bar iittcd to slide on the standard and forming a fulcrum lfor the said ratchet slide, to cant the latter, dogs pivoted on the said slide and adapted to en gage the teeth of the standard, an apertured plate holder on the said slide, a button engaging the aperture in the plate, alever engaged. by the said button and provided with a pin, and springs adapted to be compressed by the said lever pin and connected with the said dogs, substantially as shown and described.

JOSEPH l\[Cl\Il iRRlN. lllitnesses:

WAI) Sworn, HENRY WINN.

IOO 

